<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>运行Javascript</title>
<style>
.a {
font-size:18px;

}

.b {
font-size:20px;
vertical-align:top;
float:left;

}

.c {
font-size:26px;
vertical-align:bottom;
float:left;
}
</style>
<script>

</script>
</head>
<body>
<input size='20' class='a' type='text' name='in'/>
<button class='a' id='trans'> --> </button><input size='20' class='a' type='text' name='out'/>
</body>
</html>